Save guides, add subjects and pick up where you left off with your BBC account. Parallel lines are a fixed distance apart and will never meet, no matter how long they are extended. Lines that are ...

If there is more than one set of parallel lines in a diagram, different numbers of arrows are used. The three lines in this image are intersecting. They intersect at a common point. This is called ...

If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to ... it simply with marking points or lines, the graph is spread across ...